railway DFCCIL Executive 2025 Mock Test Reinforced Concrete Structures Limit State Method

IS 456 : 2000 specifies the modulus of elasticity of concrete (Ec) as:

1
\(3000\sqrt {{{\rm{f}}_{{\rm{ck}}}}}\)
2
\(5000\sqrt {{{\rm{f}}_{{\rm{ck}}}}} \)
3
\(9000\sqrt {{{\rm{f}}_{{\rm{ck}}}}} \)
4
\(7000\sqrt {{{\rm{f}}_{{\rm{ck}}}}} \)
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